diff --git a/pep-0291.txt b/pep-0291.txt
index 48df09ceb..fb77a4991 100644
--- a/pep-0291.txt
+++ b/pep-0291.txt
@@ -76,6 +76,8 @@ Backward Compatible Packages, Modules, and Tools
     sre                Fredrik Lundh               2.1
     xml (PyXML)        Martin v. Loewis            2.0
     xmlrpclib          Fredrik Lundh               1.5.2
+    modulefinder       Thomas Heller, Just van Rossum
+                                                   2.2
 
 
     Tool                         Maintainer(s)   Python Version